O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Viton Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 7 1/4 in Nominal Width 1/4 in Actual Inside Dia 7.2 in Actual Width 0.275 in Dash Number 442 Color Brown Durometer 75 Shore A Nominal Outside Dia 7 3/4 in Actual Outside Dia 7.775 in Temp Range -15 Degrees to 400 Degrees F FDA Approved No